Introduction - If you have any usage issues, please Google them yourself
Rearrangement Jiu Gong is an ancient single puzzle. Jiu Gong is said to originate from the rearrangement of China in ancient times by the Three Kingdoms story, "Guan Yu Yi Cao release" designed to intellectual toys "Huarong" and later spread to Europe, will figure into a figure. Jiugong original rearrangement problem is this: will the number 1 to 8 in accordance with any order of ranking, the box in the 3 × 3 array, leaving a space. And the number of adjacent spaces, to allow from the top, bottom, left and right direction to move to the space. The ultimate goal of the game through the legal move, the numbers 1 to 8 lined by row sequence. Under normal circumstances, n2-1 mystery issue is the number 1 ~ n2-1 in accordance with any order of rank n × n array of squares, leaving a space. Permitted number of adjacent spaces from the top, bottom, left and right four directions to move to an empty cell. The ultimate goal of the game through the legal move, transform the initial state to target